Explain Erosion Rate Effects - 4th Grade Science
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Which option best completes the statement: Higher wind speed usually causes _____ erosion rate.
Which option best completes the statement: Higher wind speed usually causes _____ erosion rate.
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A higher erosion rate. Stronger winds can move more particles per unit time.
A higher erosion rate. Stronger winds can move more particles per unit time.
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What is the relationship between erosion rate and the amount of landform change in a given time?
What is the relationship between erosion rate and the amount of landform change in a given time?
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Higher erosion rate causes more change in the same time. Faster erosion removes more material per unit time.
Higher erosion rate causes more change in the same time. Faster erosion removes more material per unit time.
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Which agent of erosion is most likely to cause rapid change during heavy rain and flooding?
Which agent of erosion is most likely to cause rapid change during heavy rain and flooding?
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Running water. Fast-flowing water carries away large amounts of soil quickly.
Running water. Fast-flowing water carries away large amounts of soil quickly.
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Which agent of erosion most often changes coastlines by wearing away cliffs and moving sand?
Which agent of erosion most often changes coastlines by wearing away cliffs and moving sand?
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Waves (ocean water). Wave action continuously strikes and wears away coastal rock.
Waves (ocean water). Wave action continuously strikes and wears away coastal rock.
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Which agent of erosion can slowly carve valleys and canyons by moving water and sediment downhill?
Which agent of erosion can slowly carve valleys and canyons by moving water and sediment downhill?
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Rivers and streams. Flowing water gradually cuts through rock over thousands of years.
Rivers and streams. Flowing water gradually cuts through rock over thousands of years.
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Which agent of erosion can move sand and soil and form dunes where it blows often?
Which agent of erosion can move sand and soil and form dunes where it blows often?
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Wind. Moving air picks up and transports loose particles.
Wind. Moving air picks up and transports loose particles.
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Which agent of erosion can scrape rock and create U-shaped valleys as it moves?
Which agent of erosion can scrape rock and create U-shaped valleys as it moves?
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Glaciers (moving ice). Ice acts like sandpaper as it slowly flows over bedrock.
Glaciers (moving ice). Ice acts like sandpaper as it slowly flows over bedrock.
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What is one main reason steep slopes often have higher erosion rates than flat areas?
What is one main reason steep slopes often have higher erosion rates than flat areas?
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Gravity pulls water and sediment downhill faster on steep slopes. Steeper angles increase water velocity and erosive power.
Gravity pulls water and sediment downhill faster on steep slopes. Steeper angles increase water velocity and erosive power.
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What effect does vegetation usually have on erosion rate in an area?
What effect does vegetation usually have on erosion rate in an area?
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It lowers erosion rate by holding soil in place. Plant roots bind soil particles together, preventing removal.
It lowers erosion rate by holding soil in place. Plant roots bind soil particles together, preventing removal.
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Identify the most likely result when wave erosion rate is high along a rocky shoreline.
Identify the most likely result when wave erosion rate is high along a rocky shoreline.
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Faster cliff retreat and coastline change. Strong waves remove more rock material per unit time.
Faster cliff retreat and coastline change. Strong waves remove more rock material per unit time.
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Which option best completes the statement: More rainfall intensity usually causes _____ erosion rate.
Which option best completes the statement: More rainfall intensity usually causes _____ erosion rate.
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A higher erosion rate. Heavy rain creates more runoff with greater erosive force.
A higher erosion rate. Heavy rain creates more runoff with greater erosive force.
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Which scenario shows the faster erosion rate: a calm stream or a fast, muddy flood?
Which scenario shows the faster erosion rate: a calm stream or a fast, muddy flood?
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A fast, muddy flood. Fast water carries more sediment than slow water.
A fast, muddy flood. Fast water carries more sediment than slow water.
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Which location is likely to have the higher erosion rate: bare soil on a steep hill or grassy flat land?
Which location is likely to have the higher erosion rate: bare soil on a steep hill or grassy flat land?
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Bare soil on a steep hill. Steep slopes and no plants create ideal erosion conditions.
Bare soil on a steep hill. Steep slopes and no plants create ideal erosion conditions.
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Which term describes landform change when erosion happens very quickly during an event?
Which term describes landform change when erosion happens very quickly during an event?
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Rapid change. Large amounts of material are removed in short time periods.
Rapid change. Large amounts of material are removed in short time periods.
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Which term describes landform change caused by erosion happening little by little over long times?
Which term describes landform change caused by erosion happening little by little over long times?
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Gradual change. Small amounts of material are removed over extended periods.
Gradual change. Small amounts of material are removed over extended periods.
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What does a low erosion rate usually cause to landforms over time?
What does a low erosion rate usually cause to landforms over time?
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Slower landform change that may be hard to notice quickly. Less material is removed per unit time, so changes occur slowly.
Slower landform change that may be hard to notice quickly. Less material is removed per unit time, so changes occur slowly.
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What does a high erosion rate usually cause to landforms over shorter time periods?
What does a high erosion rate usually cause to landforms over shorter time periods?
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Faster, more noticeable landform change. More material is removed per unit time, creating visible changes.
Faster, more noticeable landform change. More material is removed per unit time, creating visible changes.
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What is erosion rate in terms of how fast Earth materials are removed or moved?
What is erosion rate in terms of how fast Earth materials are removed or moved?
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The speed at which soil, rock, or sediment is worn away and transported. Erosion rate measures how quickly Earth's surface materials are removed.
The speed at which soil, rock, or sediment is worn away and transported. Erosion rate measures how quickly Earth's surface materials are removed.
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What does a high erosion rate mean for how fast a landform changes?
What does a high erosion rate mean for how fast a landform changes?
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The landform changes quickly. More material is removed per unit time.
The landform changes quickly. More material is removed per unit time.
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What does a low erosion rate mean for how fast a landform changes?
What does a low erosion rate mean for how fast a landform changes?
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The landform changes slowly. Less material is removed per unit time.
The landform changes slowly. Less material is removed per unit time.
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